WO2019228309A1 - Antenna, remote controller of unmanned aerial vehicle, and unmanned aerial vehicle - Google Patents

Abstract

Provided are an antenna, a remote controller for an unmanned aerial vehicle, and an unmanned aerial vehicle. The antenna can be applied to a remote controller of an unmanned aerial vehicle. The antenna comprises a substrate, a coaxial line, a first radiation unit and a first antenna ground unit, wherein the substrate has a first and a second surface opposite each other; the first radiation unit comprises a first radiation portion disposed on the first surface and a second radiation portion disposed on the second surface and electrically connected to the first radiation portion, and the current path lengths of the first radiation portion and the second radiation portion are equal; the first antenna ground unit comprises a first antenna ground portion disposed on the first surface and a second antenna ground portion disposed on the second surface and electrically connected to the first antenna ground portion, and the current path lengths of the first antenna ground portion and the second antenna ground portion are equal; and the first radiation unit and the first antenna ground unit are fed by means of the coaxial line, thereby ensuring that electromagnetic waves on both sides of the substrate of the antenna can resonate at the same resonant frequency, and improving the radiation efficiency of the antenna.

Description

Antenna, remote control of unmanned aerial vehicle and unmanned aerial vehicle

Related applications cross-reference

The application claims the priority of a Chinese patent application filed on May 30, 2018 with an application number of 201810541823.3 and an application name of "Antenna, Remote Control of Unmanned Aerial Vehicle, and Unmanned Aerial Vehicle", the entire contents of which are incorporated herein by reference Applying.

Technical field

The present invention relates to the technical field of antennas, and in particular, to an antenna, a remote controller for an unmanned aerial vehicle, and an unmanned aerial vehicle.

Background technique

With the advancement of technology, unmanned aerial vehicles have received widespread attention.

UAV for short: UAV, which has the advantages of maneuverability, fast response, unmanned flight and so on. Unmanned aerial vehicles are usually used in military and civilian fields, and they are widely used in meteorology, agriculture, exploration, photography, transportation, and entertainment. The prior art unmanned aerial vehicle generally includes a fuselage and a remote controller used in conjunction with the fuselage. The remote controller controls the take-off, attitude change, and landing of the unmanned aerial vehicle. Specifically, an antenna is provided on the remote controller, and signals are transmitted and received through the antenna, and signal transmission is performed with the airframe, thereby controlling the flight of the drone. The antenna mainly includes a substrate, a radiating unit and an antenna ground unit provided on the substrate. The radiating unit and the antenna ground unit are fed through a coaxial line, and the entire radiating unit and the entire antenna ground unit are located on the same side of the substrate.

However, because the entire radiating unit and antenna ground unit of the antenna of the prior art UAV remote control are all located on the same side of the substrate, the radiation efficiency of the antenna is low; and when the thickness of different locations of the substrate is inconsistent, As a result, the resonance frequency of the antenna is shifted, and the radiation efficiency of the antenna is reduced.

Summary of the Invention

In order to solve at least one of the problems mentioned in the background, the present invention provides an antenna, a remote controller for an unmanned aerial vehicle, and an unmanned aerial vehicle to improve the radiation efficiency of the antenna.

To achieve the above object, in a first aspect, the present invention provides an antenna applicable to a remote controller of an unmanned aerial vehicle. The antenna includes:

A substrate having a first surface and a second surface opposite to each other;

On the same axis

A first radiating unit comprising a first radiating portion and a second radiating portion electrically connected to each other, wherein the first radiating portion is provided on the first surface and the second radiating portion is provided on On the second surface, the lengths of the current paths of the first radiating portion and the second radiating portion are equal;

A first antenna ground unit comprising a first antenna ground portion and a second antenna ground portion electrically connected to each other, wherein the first antenna ground portion is disposed on the first surface, and the first antenna ground portion Two antenna ground portions are disposed on the second surface, and the current path lengths of the first antenna ground portion and the second antenna ground portion are equal;

The first radiating unit and the first antenna ground unit are fed through the coaxial line.

In the antenna of the present invention, by setting the first radiation unit as a first radiation portion and a second radiation portion that are electrically connected, and setting the first antenna ground unit as a first antenna ground portion and a second antenna ground portion that are electrically connected, The first radiation portion and the first antenna ground portion are located on the first surface of the substrate, and the second radiation portion and the second antenna ground portion are located on the second surface of the substrate opposite to the first surface, that is, on both sides of the substrate Both have radiating portions, that is, both sides of the substrate generate radiation, thereby greatly improving the radiation efficiency of the antenna; moreover, even in different thicknesses of the substrate at different positions during the production process, the substrates of the antenna of the present invention are opposite There are radiating portions and antenna ground portions on both sides, and the current path lengths of the first radiating portion located on the first surface of the substrate and the second radiating portion located on the second surface of the substrate are the same, The length of the current path between the antenna ground portion and the second antenna ground portion on the second surface of the substrate is equal, thereby ensuring that the electromagnetic waves on both sides of the antenna substrate can resonate at the same resonance frequency, so that the resonance frequency of the antenna does not Shift, thus greatly improving the radiation efficiency of the antenna.

Optionally, it further includes a first through hole penetrating through the first radiation portion, the substrate, and the second radiation portion, and the first radiation portion and the second radiation portion are disposed on the first Connection of metal parts in through holes;

It also includes a second through hole penetrating through the first antenna ground portion, the substrate, and the second antenna ground portion. The first antenna ground portion and the second antenna ground portion are disposed in the second The metal parts in the through hole are connected.

A first through hole is opened at the corresponding position of the first radiating portion, the substrate and the second radiating portion, and the first radiating portion and the second radiating portion are connected together through a metal piece in the first through hole; A second through hole is provided at the corresponding position of the ground, the substrate, and the second antenna ground. The first antenna ground and the second antenna ground are connected together through the metal parts in the second through hole, and the second antenna ground is connected through the through hole. The connection is convenient and reliable, and the appearance of the antenna is guaranteed.

Optionally, the coaxial line is located on one side of the first surface, the first radiating portion and the first antenna ground portion are spaced apart, and an outer conductor of the coaxial line is located on the first antenna One side of the ground portion is electrically connected to the ground portion of the first antenna, and the inner conductor of the coaxial line extends to the first radiation portion and is electrically connected to the first radiation portion.

Optionally, there is a gap between the coaxial line and the first surface of the substrate.

This arrangement is beneficial to improve the radiation efficiency of the antenna.

Optionally, the gap is greater than zero and less than one tenth of a wavelength, and the wavelength is a wavelength of an electromagnetic wave emitted by the antenna.

By setting the size of the gap between the coaxial line and the first surface of the substrate within this range, the performance of the antenna can be made better.

Optionally, the gap is filled with a non-conductive medium.

Optionally, the first antenna ground portion is provided with a through slot at a position corresponding to the coaxial line.

By setting a through slot at the position of the corresponding coaxial line of the first antenna ground, the influence of the coaxial line routing on the antenna performance is reduced, and the radiation efficiency of the antenna is further improved.

Optionally, the projection of the central axis of the coaxial line in the through slot coincides with the central axis of the through slot.

In this way, the coaxial cable is routed at the center of the slot, and the antenna's radiation performance is optimal at this position.

Optionally, the antenna further includes a second radiating unit and a second antenna ground unit provided on the substrate;

The second radiation unit includes a third radiation portion provided on the first surface and electrically connected to the first radiation portion, and a third radiation portion provided on the second surface and electrically connected to the second radiation portion. A fourth radiating portion, and the third radiating portion and the fourth radiating portion are electrically connected, and the current path lengths of the third radiating portion and the fourth radiating portion are equal;

The second antenna ground unit includes a third antenna ground portion provided on the first surface and electrically connected to the first antenna ground portion, and a second antenna ground portion provided on the second surface. The fourth antenna ground portion is electrically connected to the third antenna ground portion, and the third antenna ground portion and the fourth antenna ground portion are electrically connected, and the current path lengths of the third antenna ground portion and the fourth antenna ground portion are equal.

This arrangement allows the antenna to include not only the first radiating unit and the first antenna ground unit, but also the second radiating unit and the second antenna ground unit, so that the antenna can support two different working frequency bands, that is, the antenna can be used in Working in dual frequency bands improves antenna performance.

Optionally, the third radiating portion is disposed at an end of the first radiating portion near the first antenna ground portion, and the third antenna radiating portion is provided near the first antenna ground portion. One end of the first radiation part;

The fourth radiating portion is disposed at an end of the second radiating portion near the second antenna ground portion, and the fourth antenna radiating portion is provided at the second antenna ground portion near the second radiating portion. The end.

In this way, based on the realization of dual frequency bands, the space of the substrate is effectively used, and the space occupancy is saved, so that the entire volume of the antenna does not need to be large, and the antenna is developed toward miniaturization, which can be applied to a small remote control .

Optionally, the first radiation portion and the third radiation portion are integrally formed;

The first antenna ground portion and the third antenna ground portion are integrally formed;

The second radiation part and the fourth radiation part are integrally formed;

The second antenna ground portion and the fourth antenna ground portion are integrally formed.

This makes the production more convenient, and the connection between them is more reliable.

Optionally, the outer contours of the first radiating portion and the second radiating portion are the same, and the outer contours of the first antenna ground portion and the second antenna ground portion are the same;

An outer contour of the third radiating portion and the fourth radiating portion are the same, and an outer contour of the third antenna ground portion and the fourth antenna ground portion are the same.

This setting further ensures the consistency of the length of the current path on the front and back of the antenna, thereby further ensuring that the electromagnetic waves on both sides of the antenna can resonate at the same resonant frequency, making the performance of the antenna more stable.

Optionally, the antenna further includes a hollow housing, and the substrate, the first radiation unit, the first antenna ground unit, and the coaxial line are all located in an inner cavity of the housing, and the The housing has a channel through which the coaxial line can pass.

In a second aspect, the present invention provides a remote controller for an unmanned aerial vehicle, which includes a casing and the antenna as described above mounted on the casing.

According to the remote controller of the unmanned aerial vehicle of the present invention, the first antenna ground unit of the antenna is set as the first and second radiation parts that are electrically connected, and the first antenna ground unit is set as the first antenna ground that is electrically connected. And the second antenna ground portion, so that the first radiation portion and the first antenna ground portion are located on the first surface of the substrate, and the second radiation portion and the second antenna ground portion are located on the second surface of the substrate opposite to the first surface, That is to say, both sides of the substrate have radiating portions, that is, both sides of the substrate generate radiation, thereby greatly improving the radiation efficiency of the antenna; moreover, the thickness of different locations of the substrate is not uniform even during the production process. There are radiating portions and antenna ground portions on two opposite sides of the substrate of the remote control antenna of the remote control, and the length of the current path of the first radiating portion on the first surface of the substrate and the second radiating portion on the second surface of the substrate exists. Equal, the current path length of the first antenna ground portion on the first surface of the substrate and the second antenna ground portion on the second surface of the substrate are equal, thereby ensuring that the electromagnetic waves on both sides of the antenna substrate can be at the same resonance frequency. Resonance, the resonance frequency of the antenna does not shift, greatly improving the radiation efficiency of the antenna, so that a signal transmitted between the remote control and the body of an unmanned aerial vehicle is more accurate and timely.

According to a third aspect, the present invention provides an unmanned aerial vehicle, including an airframe and a remote controller of the above-mentioned unmanned aerial vehicle used in conjunction with the airframe.

In the unmanned aerial vehicle of the present invention, the first radiation unit of the remote control antenna provided with the unmanned aerial vehicle is set as the first radiation part and the second radiation part that are electrically connected, and the first antenna ground unit is set as the first antenna that is electrically connected. The ground portion and the second antenna ground portion, with the first radiation portion and the first antenna ground portion on the first surface of the substrate, and the second radiation portion and the second antenna ground portion on the second surface of the substrate opposite to the first surface That is, both sides of the substrate have radiating portions, that is, both sides of the substrate generate radiation, thereby greatly improving the radiation efficiency of the antenna; moreover, even in different thicknesses of the substrate during the production process, due to the inconsistent thickness, In the remote control antenna substrate of the present invention, there are radiating portions and antenna ground portions on two opposite sides of the substrate, and the current of the first radiating portion located on the first surface of the substrate and the second radiating portion located on the second surface of the substrate exists. The path length is the same, and the current path length of the first antenna ground portion on the first surface of the substrate and the second antenna ground portion on the second surface of the substrate are the same, thereby ensuring that the electromagnetic waves on both sides of the antenna substrate can be the same. The vibration frequency of the resonator, the resonance frequency of the antenna does not shift, greatly improving the radiation efficiency of the antenna, so that a signal transmitted between the remote control and the body of an unmanned aerial vehicle is more accurate and timely.

The structure of the present invention and its other objects and beneficial effects will be more apparent and comprehensible through the description of the preferred embodiments in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative labor.

FIG. 1 is a schematic structural diagram of a first surface of a substrate of an antenna according to a first embodiment of the present invention; FIG.

2 is a schematic structural diagram of a second surface of a substrate of an antenna according to Embodiment 1 of the present invention;

3 is a side structural view of an antenna provided by Embodiment 1 of the present invention;

4 is a schematic structural diagram of an antenna provided with a casing according to Embodiment 1 of the present invention;

FIG. 5 is a directional view of an antenna provided on a horizontal plane and a vertical plane according to the first embodiment of the present invention; FIG.

6 is a schematic structural diagram of a first surface of a substrate of an antenna provided in Embodiment 2 of the present invention;

7 is a schematic structural diagram of a second surface of a substrate of an antenna according to Embodiment 2 of the present invention;

8 is a schematic structural diagram of an antenna provided with a casing according to Embodiment 2 of the present invention;

FIG. 9 is a standing wave parameter diagram of an antenna provided by Embodiment 2 of the present invention; FIG.

FIG. 10 is a directional view of an antenna provided on a horizontal plane and a vertical plane according to Embodiment 2 of the present invention; FIG.

11 is a schematic structural diagram of a remote controller of an unmanned aerial vehicle provided by Embodiment 3 of the present invention;

FIG. 12 is a schematic structural diagram of a body of an unmanned aerial vehicle according to a fourth embodiment of the present invention.

Reference sign description:

10—antenna; 1—substrate; 11—first side; 12—second side; 13—positioning gap; 21—first radiating part; 22—second radiating part; 20—first through hole; 31—first Antenna ground; 32—second antenna ground; 311—through slot; 30—second through hole; 4—coaxial line; 41—outer conductor; 42—inner conductor; 43, 44—pad; 40—gap ; 9- shell; 91- lower shell; 92- upper cover; 90- positioning card convex; 51- third radiating section; 52- fourth radiating section; 61- third antenna ground; 62- fourth antenna ground 7-remote control; 71-main body; 72-handle; 81-body; 82-arm; 83-motor.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description created by the present invention, it should be understood that the orientations or positional relationships indicated by the terms “left”, “right”, “vertical”, and “lateral” are based on the orientations or positional relationships shown in the drawings, and only It is to facilitate the description of the invention and simplify the description, and does not indicate or imply that the device or element referred to must have a specific orientation, structure and operation in a specific orientation, and therefore cannot be understood as a limitation on the invention. In addition, the terms "first", "second", "third", "fourth", etc. are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", "fourth", etc. may explicitly or implicitly include one or more of the features.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" should be understood in a broad sense unless otherwise specified and limited, for example, they may be fixed connections, or may be Disassembly connection, or integral connection; it can be mechanical or electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the creation of the present invention can be understood through specific situations.

The antenna of the present invention, a remote controller of an unmanned aerial vehicle using the antenna, and an unmanned aerial vehicle will be described in detail through specific embodiments.

Example one

FIG. 1 is a schematic structural diagram of a first surface of a substrate of an antenna according to a first embodiment of the present invention. FIG. 2 is a schematic structural diagram of a second surface of a substrate of an antenna provided by Embodiment 1 of the present invention. FIG. 3 is a side structural view of an antenna provided by Embodiment 1 of the present invention. Referring to FIG. 1 to FIG. 3, the present invention provides an antenna. The antenna can be applied to the remote control of an unmanned aerial vehicle.

The antenna 10 includes a substrate 1 and a first radiation unit and a first antenna ground unit provided on the substrate 1. The first radiation unit and the first antenna ground unit are fed through a coaxial line 4. Specifically, the coaxial line 4 has an outer conductor 41, an inner conductor 42, and an insulating dielectric layer located between the outer conductor 41 and the inner conductor 42. The inner conductor 42 (ie, the feeding end) of the coaxial line 4 and the first The radiating unit is connected, and the outer conductor 41 (ie, the ground terminal) of the coaxial line 4 is connected to the first antenna ground unit.

The substrate 1 has a first surface 11 and a second surface 12 opposite to each other. The first radiating unit includes: a first radiating portion 21 and a second radiating portion 22, the first radiating portion 21 is provided on the first surface 11, the second radiating portion 22 is provided on the second surface 12, and the first radiating portion 21 It is electrically connected to the second radiating portion 22, and the current path lengths of the first radiating portion 21 and the second radiating portion 22 are equal. The first antenna ground unit includes a first antenna ground portion 31 and a second antenna ground portion 32. The first antenna ground portion 31 is provided on the first surface 11 and the second antenna ground portion 32 is provided on the second surface 12. The second antenna ground portion 32 and the first antenna ground portion 31 are electrically connected, and the current path lengths of the first antenna ground portion 31 and the second antenna ground portion 32 are equal.

It can be understood that the first surface 11 of the substrate 1 has a first radiating portion 21 and a first antenna ground portion 31, and the second surface 12 of the substrate 1 has a second radiating portion 22 and a second antenna ground portion 32, that is, A part of the first radiation unit is located on the first surface 11 of the substrate 1, another part of the first radiation unit is located on the second surface 12 of the substrate 1, and a portion of the first antenna ground unit is located on the first surface 11 of the substrate 1. The other part of the antenna ground unit is located on the second surface 12 of the substrate 1, that is, both sides of the substrate 1 have a radiating portion and an antenna ground portion, and both sides of the substrate 1 can generate radiation, thereby greatly improving the radiation efficiency of the antenna 10. .

In the prior art, the entire radiating unit and the antenna ground unit are disposed on the same surface of the substrate. If the thicknesses of different locations of the substrate are not consistent during the production process, that is, when the thickness of the substrate is uneven, the resonance frequency of the antenna will occur. Offset, resulting in reduced antenna radiation efficiency. In this embodiment, even if the thickness of the substrate 1 is not uniform, since both sides of the substrate 1 in this embodiment have radiation portions and antenna ground portions, and the first radiation portion 21 is located on the first surface 11 of the substrate 1. The length of the current path is the same as the length of the current path of the second radiating portion 22 on the second surface 12 of the substrate 1, and the length of the first antenna ground portion 31 on the first surface 11 of the substrate 1 and the second antenna ground portion 32 on the second surface 12 of the substrate 1 The lengths of the current paths are equal, thereby ensuring that electromagnetic waves on both sides of the antenna substrate can resonate at the same resonance frequency, so that the resonance frequency of the antenna 10 does not shift, thereby improving the radiation efficiency of the antenna 10.

It should be noted that, as shown in FIG. 1 and FIG. 2, the current paths of the first radiating part 21 and the second radiating part 22 are equal in length, and the current paths here are mainly along the edges of the first radiating unit, that is, , Along the edge of the first radiating portion 21 and the edge of the second radiating portion 22. The lengths of the current paths of the first antenna ground portion 31 and the second antenna ground portion 32 are the same. The current paths here are mainly along the edges of the first antenna unit, that is, along the edges of the first antenna ground 31 and The edges of the two antenna ground portions 32. It should be noted that the present invention is not limited to the specific path of the current, as long as the current path lengths of the first radiating part 21 and the second radiating part 22 can be ensured to be equal, and the first antenna ground part 31 and the second antenna ground part are guaranteed The current path lengths of 32 may be equal.

The substrate 1 may be a printed circuit board (PCB), that is, the antenna 10 in this embodiment may be a PCB antenna. Specifically, the first radiation unit and the first antenna ground unit may be made of a metal (such as a copper sheet) on the substrate 1. Since the first radiation unit and the first antenna ground unit are distributed on the first surface 11 and the second surface 12 of the substrate 1, it is equivalent to having metal on the front and back surfaces of the substrate 1, thereby reducing the radiation loss of the substrate 1 and improving The performance of the antenna.

The antenna 10 of this embodiment can be specifically applied to a remote controller of an unmanned aerial vehicle. It can be understood that the remote controller is used in conjunction with the body of the unmanned aerial vehicle, and transmits and receives signals through the antenna 10, thereby realizing the remote controller and the unmanned aerial vehicle. Communication between aircraft bodies. It should be noted that the antenna 10 can also be applied to other devices that need to transmit and receive signals.

In the antenna 10 provided in this embodiment, by setting the first radiating unit as the first radiating portion 21 and the second radiating portion 22 electrically connected, the first antenna ground unit is set as the first antenna ground portion 31 and the first electrically connected portion. Two antenna ground portions 32 such that the first radiation portion 21 and the first antenna ground portion 31 are located on the first surface 11 of the substrate 1, and the second radiation portion 22 and the second antenna ground portions 32 are located on the first surface 11 of the substrate 1 The second surface 12 opposite to each other, that is, both sides of the substrate 1 have radiating portions, that is, both sides of the substrate 1 generate radiation, thereby greatly improving the radiation efficiency of the antenna 10; moreover, even in the production process The thicknesses of the different positions of the middle substrate 1 are inconsistent. Since two opposite sides of the antenna substrate 1 of this embodiment have radiating portions and antenna ground portions, and the first radiating portions 21 and The length of the current path of the second radiating portion 22 on the second surface 12 of the substrate is equal, and the length of the current path of the first antenna ground portion 31 on the first surface 11 of the substrate and the second antenna ground portion 32 on the second surface 12 of the substrate are equal. To ensure that the electromagnetic waves on both sides of the antenna substrate can The resonant frequency, the resonance frequency of the antenna does not shift, thereby greatly improving the radiation efficiency of the antenna 10.

Among them, the coaxial line 4 can be located on one side of the first surface 11 of the substrate 1. It can be understood that the first radiating portion 21 and the first antenna ground portion 31 are spaced apart, and the outer conductor 41 of the coaxial line 4 is located on one side of the first antenna ground portion 31 and is electrically connected to the first antenna ground portion 31. The inner conductor 42 on the same axis 4 extends to the first radiating portion 21 and is electrically connected to the first radiating portion 21. Since the second radiating portion 22 is electrically connected to the first radiating portion 21, that is, the second radiating portion 22 is electrically connected to the inner conductor 42 of the coaxial line 4. Since the second antenna ground portion 32 is electrically connected to the first antenna ground portion 31, that is, the second antenna ground portion 32 is electrically connected to the outer conductor 41 of the coaxial line 4, so that the first radiation unit and the first antenna ground unit pass through. Co-axial 4 feeds.

For example, as shown in FIGS. 1 and 2, the first antenna ground portion 31 is disposed on the left half of the first surface 11 of the substrate 1, and the first radiation portion 21 is disposed on the right half of the first surface 11 of the substrate 1. unit. The second antenna ground portion 32 is provided on the left half of the second surface 12 of the substrate 1, and the second radiation portion 22 is provided on the right half of the second surface 12 of the substrate 1. Of course, the two positions can also be interchanged, as long as the positions of the first radiating portion 21 and the second radiating portion 22 are ensured to correspond, and the positions of the first antenna ground portion 31 and the second antenna ground portion 32 may be corresponding. Referring to FIGS. 1 to 3, in a specific implementation, a pad 43 is provided at an end of the first antenna ground portion 31 near the first radiating portion 21, and the first antenna ground portion 31 and the coaxial line 4 pass through the pad 43. The outer conductors 41 are welded together; a pad 44 is provided at an end of the first radiating portion 21 near the first antenna ground portion 31, and the first radiating portion 21 is welded to the inner conductor 42 of the coaxial line 4 through the pad 44 together.

It should be noted that, in other implementation manners, the coaxial line 4 may also be located on one side of the second surface 12 of the substrate 1, and the above-mentioned functions may also be implemented.

Referring to FIG. 1 and FIG. 2, in this embodiment, it is more preferable that the antenna 10 further includes a first through hole 20 penetrating the first radiation portion 21, the substrate 1, and the second radiation portion 22. The portion 21 and the second radiating portion 22 are connected by a metal member provided in the first through hole 20. At the same time, the antenna 10 also has a second through hole 30 penetrating through the first antenna ground portion 31, the substrate 1, and the second antenna ground portion 32. The first antenna ground portion 31 and the second antenna ground portion 32 are provided in the second The metal parts in the through hole 30 are connected. That is, the first radiating portion 21 and the second radiating portion 22 and the first antenna ground portion 31 and the second antenna ground portion 32 are all connected through a through hole. In specific implementation, after the first through-holes 20 and the second through-holes 30 are opened, metal is melted into the first through-holes 20 and the second through-holes 30 respectively. After the molten metal is solidified and cooled, the first The radiating portion 21 and the second radiating portion 22 are electrically connected together, and the first antenna ground portion 31 and the second antenna ground portion 32 are connected together. Of course, the metal part may also be a metal wire or a metal wire passing through the first through hole 20 and the second through hole 30.

In specific implementation, there may be multiple first through holes 20. For example, multiple first through holes 20 may be arranged at intervals along the edges of the first radiation portion 21 and the second radiation portion 22. There may be a plurality of second through holes 30. For example, the plurality of second through holes 30 may be arranged at intervals along the edges of the first antenna ground portion 31 and the second antenna ground portion 32. Since the antenna 10 is working, the path of the current on the front and the back of the antenna 10 runs along the edges of the first radiation unit and the first antenna ground unit. By arranging the first through holes 20 along the edges of the first radiation unit, The second through holes 30 are arranged along the edge of the ground unit of the first antenna, thereby ensuring the direction of the current.

The number of the first through-holes 20 and the second through-holes 30 is not limited by the present invention, as long as at least a sufficient number of first through-holes are provided near the feeding end of the coaxial line 4 (near the right end of the inner conductor in FIG. 1). The holes 20 may have a sufficient number of second through holes 30 near the ground end of the coaxial line 4 (near the right end of the outer conductor in FIG. 1).

More preferably, the outer contours of the first radiating portion 21 and the second radiating portion 22 can be the same, and the outer contours of the first antenna ground portion 31 and the second antenna ground portion 32 are the same, that is, the front and back sides of the antenna 10 are further ensured. The consistency of the current path length further ensures that the electromagnetic waves on both sides of the antenna 10 can resonate at the same resonance frequency, which makes the performance of the antenna 10 more stable and facilitates the manufacture of the antenna.

Of course, in other implementations, the outer contours of the first radiating portion 21 and the second radiating portion 22 may not be completely consistent, and the outer contours of the first antenna ground portion 31 and the second antenna ground portion 32 may not be completely consistent. As long as the current path lengths of the first radiating portion 21 and the second radiating portion 22 can be guaranteed to be equal, the current path lengths of the first antenna ground portion 31 and the second antenna ground portion 32 can be equal.

In this embodiment, there is a gap 40 between the coaxial line 4 and the first surface 11 of the substrate 1. That is, referring to FIG. 3, a certain gap 40 is maintained between the outer conductor 41 of the coaxial line 4 and the first surface 11 of the substrate 1. The right end of the outer conductor 41 of the coaxial line 4 is welded to the first antenna ground portion 31. On the pad 43. By keeping a certain gap 40 between the coaxial line 4 and the first surface 11 of the substrate 1, the interference of the antenna of the coaxial line 4 on the antenna can be reduced, and the radiation efficiency of the antenna 10 can be improved.

More preferably, the gap 40 may be set to a wavelength greater than zero and less than one tenth, which is the wavelength of the electromagnetic wave emitted by the antenna 10. It can be understood that different frequencies have different wavelengths. The corresponding wavelength can be calculated according to the frequency, and then the specific size of the gap 40 can be set according to the wavelength. By setting the size of the gap 40 between the coaxial line 4 and the first surface 11 of the substrate 1 within this range, the performance of the antenna 10 can be made better.

With continued reference to FIGS. 1 to 3, in this embodiment, the substance in the gap 40 is air, that is, there is no filler in the gap 40. Of course, in other implementations, the gap 40 may also be filled with a non-conductive medium, so that the gap 40 between the coaxial line 4 and the substrate 1 is maintained at a fixed distance. For example, the medium may be foam, of course, or other The medium having a low dielectric constant is not limited thereto.

Further, when the coaxial line 4 is located on one side of the first surface 11 of the substrate 1, a through slot 311 may be provided at a position corresponding to the coaxial line 4 of the first antenna ground portion 31, that is, the through slot 311 runs through the first The body of an antenna ground 31. By setting a through slot 311 at a position of the first antenna ground 31 corresponding to the coaxial line 4, the influence of the coaxial line 4 routing on the performance of the antenna 10 is reduced, and the radiation efficiency of the antenna 10 is further improved.

More preferably, the projection of the central axis of the coaxial line 4 in the through groove 311 coincides with the central axis of the through groove 311. That is, the routing of the coaxial line 4 is at the center position of the through slot 311, and the radiation performance of the antenna 10 is the best at this position.

The antenna 10 of this embodiment can work at 2.28 GHz to 2.7 GHz, and the bandwidth is 420 MHz, which can meet the coverage of the commonly used 2.4 GHz frequency band. FIG. 5 is a directional diagram of the antenna provided in the first embodiment of the present invention on a horizontal plane and a vertical plane. Referring to FIG. 5, the antenna 10 of this embodiment is at 2.4 GHz, and the horizontal direction (H-plane) can still maintain omnidirectional, and the vertical direction (E-plane) gain is large, that is, the antenna 10 is at 2.4 GHz can achieve omnidirectional coverage.

The antenna 10 of this embodiment is specifically formed as a dipole antenna. Of course, in other implementations, it may also be a monopole antenna. For example, when it is a monopole antenna, the left half of the first surface 11 and the left half of the second surface 12 of the substrate 1 may be filled. Copper sheet. Or it can be an inverted-F antenna and so on.

FIG. 4 is a schematic structural diagram of an antenna provided with a casing according to Embodiment 1 of the present invention. As shown in FIG. 4, the antenna 10 of this embodiment further includes a hollow casing 9. The substrate 1, the first radiation unit, the first antenna ground unit, and the coaxial line 4 are all located in the inner cavity of the housing 9, and the housing 9 has a passage through which the coaxial line 4 can pass. By providing the casing 9, the antenna 10 is effectively protected.

The casing 9 specifically includes a lower casing 91 and an upper cover 92 detachably connected above the lower casing 91. The upper cover 92 and the lower casing 91 together form a cavity, so that the casing 9 forms a hollow structure. Specifically, it further includes a positioning structure for fixing the substrate 1 in the housing 9, and the positioning structure may specifically include: a positioning notch 13 provided on an edge of the substrate 1 and a snap-in hole provided in the inner cavity of the housing 9. The positioning card convex 90 in the positioning notch 13.

When the antenna 10 is applied to a remote control of an unmanned aerial vehicle, the antenna 10 is specifically installed on the main body of the remote control. The remote control has a radio frequency board, and the radio frequency board has a radio frequency interface. One end is connected to the radio frequency interface, so as to realize the signal transmission between the remote controller and the body of the unmanned aerial vehicle.

Example two

FIG. 6 is a schematic structural diagram of a first surface of a substrate of an antenna provided in Embodiment 2 of the present invention. FIG. 7 is a schematic structural diagram of a second surface of a substrate of an antenna provided in Embodiment 2 of the present invention. 6 and FIG. 7, this embodiment provides an antenna 10 with another structure. This embodiment further adds a second radiating unit and a second antenna ground unit to the substrate 1 on the basis of the antenna provided in the first embodiment. .

The second radiating unit includes a third radiating portion 51 provided on the first surface 11 of the substrate 1 and electrically connected to the first radiating portion 21, and a second radiating portion provided on the second surface 12 of the substrate 1. The fourth radiating portion 52 is electrically connected to the portion 22, and the third radiating portion 51 and the fourth radiating portion 52 are electrically connected. The lengths of the current paths of the third radiating portion 51 and the fourth radiating portion 52 are equal. The second antenna ground unit specifically includes a third antenna ground portion 61 provided on the first surface 11 of the substrate 1 and electrically connected to the first antenna ground portion 31, and a second antenna ground portion provided on the second surface 12 of the substrate 1 and a second antenna ground portion 61. The fourth antenna ground portion 62 is electrically connected to the antenna ground portion 32, and the third antenna ground portion 61 and the fourth antenna ground portion 62 are electrically connected. The current path lengths of the third antenna ground portion 61 and the fourth antenna ground portion 62 are equal.

It can be understood that, because the first radiating unit and the first antenna ground unit are fed through the coaxial line 4, the third radiating portion 51 is electrically connected to the first radiating portion 21, and the fourth radiating portion 52 and the second radiating portion 22 The third antenna ground portion 61 is electrically connected to the first antenna ground portion 31, and the fourth antenna ground portion 62 is electrically connected to the second antenna ground portion 32. Therefore, the second radiation unit and the second antenna ground unit are coaxially connected. Line 4 is fed.

Wherein, the lengths of the current paths of the third radiating part 51 and the fourth radiating part 52 are the same, and the current paths here are mainly along the edge of the second radiating unit, that is, along the edge of the third radiating part 51 and the fourth The edge of the radiating portion 52. The lengths of the current paths of the third antenna ground portion 61 and the fourth antenna ground portion 62 are the same. The current paths here are mainly along the edge of the second antenna unit, that is, along the edges of the third antenna ground portion 61 and the first antenna ground portion 61. Edge of the four-antenna ground portion 62. As for the specific path of the current, the present invention is not limited to this, as long as the current path lengths of the third radiating portion 51 and the fourth radiating portion 52 can be ensured to be equal, and the current path lengths of the third antenna ground portion 61 and the fourth antenna ground portion 62 are guaranteed Equal.

That is, the antenna 10 provided in this embodiment includes not only the first radiating unit and the first antenna ground unit, but also the second radiating unit and the second antenna ground unit, so that the antenna 10 can support two different working frequency bands. That is, the antenna 10 can work in a dual frequency band, which greatly improves the performance of the antenna 10.

In this embodiment, the third radiating portion 51 is specifically disposed at an end of the first radiating portion 21 near the first antenna ground portion 31, and the third antenna ground portion 61 is provided near the first radiating portion 31 of the first antenna ground portion 31 21's end. The fourth radiating portion 52 is provided at an end of the second radiating portion 22 near the second antenna ground portion 32, and the fourth antenna ground portion 62 is provided at an end of the second antenna ground portion 32 near the second radiating portion 22.

6 and FIG. 7, the size of the first radiation portion 21 in the direction from the right edge of the substrate 1 to the middle portion of the substrate 1 can be gradually reduced, that is, the size of the first radiation portion 21 near the center of the substrate 1 is gradually reduced. One end is a small end, and the end near the right edge of the substrate 1 is a large end. The third radiating portion 51 is specifically disposed at the small end of the first radiating portion 21. The size of the second radiating portion 22 in the direction from the right edge of the substrate 1 to the middle portion of the substrate 1 can be gradually reduced, that is, the end of the second radiating portion 22 near the center of the substrate 1 is a small end and close to the right edge of the substrate 1 One end is a large end, and the fourth radiating portion 52 is specifically disposed at the small end of the second radiating portion 22. The size of the first antenna ground portion 31 in the direction from the left edge of the substrate 1 to the middle portion of the substrate 1 can be gradually reduced, that is, the end of the first antenna ground portion 31 near the center of the substrate 1 is a small end and is close to the substrate. One end of the left edge is a large end, and the third antenna ground portion 61 is specifically disposed at the small end of the first antenna ground portion 31. The size of the second antenna ground portion 32 in the direction from the left edge of the substrate 1 to the middle portion of the substrate 1 can be gradually reduced, that is, the end of the second antenna ground portion 32 near the center of the substrate 1 is a small end and is close to the substrate. One end of the left edge is a large end, and the fourth antenna ground portion 62 is specifically disposed at the small end of the second antenna ground portion 32. In this way, based on the realization of dual frequency bands, the existing space of the substrate 1 is effectively used, and the space occupancy is saved, so that the entire volume of the antenna 10 does not need to be large, and the antenna 10 is developed toward miniaturization, which can be applied. On the small remote control 7.

The overall size of the substrate 1 of the antenna 10 of this embodiment may be set to 49.8 × 6.8 × 0.8 mm ³ .

In this embodiment, the third radiating portion 51, the fourth radiating portion 52, the third antenna ground portion 61, and the fourth antenna ground portion 62 are U-shaped structures. Of course, in other implementations, these four portions are also The structures may be L-shaped, which is not limited in the present invention. The specific shape may be combined with the size of the substrate 1 and the shapes of the first radiating portion 21, the second radiating portion 22, the first antenna ground portion 31, and the second antenna ground portion 32. Make settings.

Specifically, the first radiating portion 21 and the third radiating portion 51 may be integrally formed, the first antenna ground portion 31 and the third antenna ground portion 61 are integrally formed, the second radiating portion 22 and the fourth radiating portion 52 are integrally formed, and the second antenna The ground portion 32 and the fourth antenna ground portion 62 are integrally formed, which makes the production more convenient and the connection between them more reliable. Of course, in other implementation manners, the corresponding parts may also be subsequently electrically connected together.

Among them, the third radiating portion 51 and the fourth radiating portion 52, and the third antenna ground portion 61 and the fourth antenna ground portion 62 may also be connected through the through holes in the first embodiment. Specifically, a part of the first through hole 20 penetrates the third radiating portion 51, the substrate 1, and the fourth radiating portion 52, and then the third radiating portion 51 and the fourth radiating portion 52 realize electricity through a metal member located in the first through hole 20. connection. Part of the second through hole 30 penetrates the third antenna ground 61, the substrate 1 and the fourth antenna ground 62, and then the third antenna ground 61 and the fourth antenna ground 62 are realized by a metal piece located in the second through hole 30. Electrical connection.

It can be understood that when the first radiating portion 21 and the third radiating portion 51 are integrally formed, and the second radiating portion 22 and the fourth radiating portion 52 are integrally formed, the first radiating portion 21 and the third radiating portion 51 may be directly formed. A first through hole 20 is provided at the contact point, and at the contact point of the second radiating portion 22 and the fourth radiating portion 52. When the first antenna ground portion 31 and the third antenna ground portion 61 are integrally formed, and the second antenna ground portion 32 and the fourth antenna ground portion 62 are integrally formed, the first antenna ground portion 31 and the third antenna ground portion 61 may be directly formed. A second through hole 30 is provided at a junction between the second antenna ground portion 32 and a fourth antenna ground portion 62.

More preferably, the outer contours of the third radiating portion 51 and the fourth radiating portion 52 can be the same, and the outer contours of the third antenna ground portion 61 and the fourth antenna ground portion 62 are the same, that is, the front and back sides of the antenna 10 are further ensured. The consistency of the current path length further ensures that the electromagnetic waves on both sides of the antenna 10 can resonate at the same resonance frequency, which makes the performance of the antenna 10 more stable and facilitates the manufacture of the antenna.

Of course, in other implementations, the outer contours of the third radiating portion 51 and the fourth radiating portion 52 may not be completely consistent, and the outer contours of the third antenna ground portion 61 and the fourth antenna ground portion 62 may not be completely consistent. As long as the current path lengths of the third radiating portion 51 and the fourth radiating portion 52 can be guaranteed to be equal, the current path lengths of the third antenna ground portion 61 and the fourth antenna ground portion 62 can be equal.

FIG. 9 is a standing wave parameter diagram of an antenna provided by Embodiment 2 of the present invention. As shown in FIG. 9, the antenna 10 of this embodiment can specifically work at 2.28GHz to 2.7GHz and 5.57GHz to 6.21GHz, and the bandwidth is 420MHz and 640MHz, respectively, which can meet the commonly used Wi-Fi dual bands of 2.4GHz and 5.8GHz. Of coverage. FIG. 10 is a directional diagram of the antenna provided on the horizontal plane and the vertical plane according to the second embodiment of the present invention. Referring to FIG. 10, the antenna 10 of this embodiment is at 5.8 GHz, and the horizontal direction (H-plane) can still maintain omnidirectional, and the vertical direction (E-plane) gain is large, that is, the antenna 10 is at 5.8 GHz can achieve omnidirectional coverage. With reference to FIG. 5, FIG. 9, and FIG. 10, it can be understood that the antenna 10 of this embodiment can achieve omnidirectional coverage at 2.4 GHz and 5.8 GHz, thereby improving the radiation efficiency of the antenna 10 and making the performance of the antenna 10 better.

The antenna 10 working at 2.4 GHz is mainly completed by the first radiating portion 21, the second radiating portion 22, the first antenna ground portion 31 and the second antenna ground portion 32, and the work at 5.8 GHz is mainly performed by the third radiating portion 51 and the fourth radiating portion. The part 52, the third antenna ground part 61, and the fourth antenna ground part 62 are completed.

Since the current path lengths of the first radiating portion 21 on the first surface 11 of the substrate 1 and the second radiating portion 12 on the second surface 12 of the substrate 1 are equal, the first antenna ground portion 31 on the first surface 11 of the substrate 1 The current path length is the same as the current path length of the second antenna ground portion 32 on the second surface 12 of the substrate. The current path of the third radiation portion 51 on the first surface 11 of the substrate 1 and the fourth radiation portion 52 on the second surface 12 of the substrate. The lengths of the current paths are equal, and the lengths of the current paths of the third antenna ground portion 61 on the first surface 11 of the substrate and the fourth antenna ground portion 62 on the second surface of the substrate are equal. Therefore, in the 2.4 GHz band or in the 5, 8 GHz band The electromagnetic waves on both sides of the substrate 1 of the antenna can resonate at the same resonance frequency, so that the resonance frequency of the antenna does not shift, thereby greatly improving the radiation efficiency of the antenna.

FIG. 8 is a schematic structural diagram of an antenna provided with a casing according to Embodiment 2 of the present invention. Referring to FIG. 8, the antenna 10 of this embodiment further includes a hollow casing 9. The substrate 1, the first radiation unit, the first antenna ground unit, the second antenna ground unit, the second antenna ground unit, and the coaxial line 4 are all located in the inner cavity of the housing 9, and the housing 9 has a coaxial line available for it. 4 passages through. The specific structure of the casing 9 is the same as that of the first embodiment, and can achieve the same or similar technical effects, which will not be repeated here.

It should be noted that the antenna 10 of this embodiment can also be used for other wireless communication frequency bands, which can be achieved by changing the shape and size of the second radiation unit and the ground unit of the second antenna, or by further increasing the substrate 1 Radiation unit and antenna ground unit.

Other technical features are the same as those of the first embodiment, and can bring the same or similar technical effects, which are not repeated here one by one. For details, refer to the description of the first embodiment.

Example three

FIG. 11 is a schematic structural diagram of a remote controller of an unmanned aerial vehicle provided by Embodiment 3 of the present invention. With reference to FIG. 1 to FIG. 11, this embodiment provides a remote controller of an unmanned aerial vehicle. The remote controller 7 of the unmanned aerial vehicle is used to communicate with the body of the unmanned aerial vehicle to obtain the body of the unmanned aerial vehicle. Flight speed, altitude, position and other information to control the take-off, flight attitude, direction, landing, etc. of the UAV.

The remote controller 7 may include a main body 71. The main body 71 is provided with an antenna 10 and a handle 72 for holding by a user. The remote controller 7 specifically transmits and receives signals through the antenna 10.

The antenna 10 on the remote control 7 of this embodiment has the same structure as the antenna 10 provided in the first or second embodiment, and can bring the same or similar technical effects, which are not repeated here one by one, and specific implementation can refer to the implementation Description of the first or second embodiment.

In this embodiment, two antennas 10 are specifically provided. The two antennas 10 are disposed at intervals on the main body 71 of the remote control 7. One end of the antenna 10 is rotatably connected to the main body 71 of the remote control 7. When not in use, the antennas may be connected. 10 is retracted to the main body of the remote control 7 for convenient carrying or storage. Of course, in other implementation manners, the antenna 10 may also be one or more than two.

In specific implementation, a radio frequency board is provided in the main body 71 of the remote controller 7, and a radio frequency interface is provided on the radio frequency board. The end of the coaxial cable 4 protruding from the casing 9 is electrically connected to the radio frequency interface. Among them, the body of the unmanned aerial vehicle has an antenna, a flight controller, and a transmitting and receiving control unit. The antenna on the body is electrically connected to the transceiver control unit, and communicates with the remote controller 7 under the control of the transceiver control unit. The flight controller is connected to the transceiver control unit, and is used to control the unmanned aerial vehicle according to the control signal.

For example, when the remote control 7 needs to control the unmanned aerial vehicle, the remote control 7 sends a control signal to the body of the unmanned aerial vehicle through the antenna 10, and the antenna on the body receives the control signal sent by the remote control 7 under the control of the transceiver control unit. Alternatively, the body of the unmanned aerial vehicle sends a feedback signal to the remote controller 7 through the antenna on the body. For example, when the remote controller 7 requires the body of the unmanned aerial vehicle to fly 50 meters east from the current position within 1 minute, the remote controller 7 sends a signal to the unmanned aerial vehicle through the antenna 10, and the transceiver control unit controls the antenna of the body to receive the control signal. The signal is then transmitted to the flight controller. The flight controller parses the signal and obtains the command information for flying 50 meters east from the current position within 1 minute. Then the flight controller controls the body of the unmanned aerial vehicle to perform corresponding actions. To make the UAV fly 50 meters east in 1 minute.

Since two opposite sides of the substrate 1 of the antenna 10 have a radiating portion and an antenna ground portion, and the current path lengths of the first radiating portion 21 and the second radiating portion 22 are equal, the first antenna ground portion 31 and the second antenna portion The lengths of the current paths of the antenna ground portions 32 are equal. Therefore, the radiation efficiency of the antenna 10 of the remote controller 7 in this embodiment is high, and the signal transmission between the remote controller 7 and the body of the unmanned aerial vehicle is more accurate and timely.

Example 4

FIG. 12 is a schematic structural diagram of a body of an unmanned aerial vehicle according to a fourth embodiment of the present invention. Referring to FIG. 12, this embodiment provides an unmanned aerial vehicle. The unmanned aerial vehicle includes a body 81 and a remote controller used in conjunction with the body 81, and the body 81 is controlled by the remote controller to fly.

Among them, the body 81 has an arm 82, and an end of the arm 82 may be provided with a power device. The power device may specifically include a rotor (not shown in the figure) and a motor 83. The motor 83 is used to drive the rotor to rotate. Human aircraft flying provides power.

The structure of the remote controller in this embodiment is the same as that of the remote controller 7 provided in the third embodiment, and can bring the same or similar technical effects, which will not be described one by one here. For details, refer to the description of the third embodiment.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention. range.

Claims (15)

1. An antenna can be applied to a remote controller of an unmanned aerial vehicle, characterized in that the antenna includes:

   A substrate having a first surface and a second surface opposite to each other;

   On the same axis

   A first radiating unit comprising a first radiating portion and a second radiating portion electrically connected to each other, wherein the first radiating portion is provided on the first surface and the second radiating portion is provided on On the second surface, the lengths of the current paths of the first radiating portion and the second radiating portion are equal;

   A first antenna ground unit comprising a first antenna ground portion and a second antenna ground portion electrically connected to each other, wherein the first antenna ground portion is disposed on the first surface, and the first antenna ground portion Two antenna ground portions are disposed on the second surface, and the current path lengths of the first antenna ground portion and the second antenna ground portion are equal;

   The first radiating unit and the first antenna ground unit are fed through the coaxial line.
2. The antenna according to claim 1, further comprising a first through hole penetrating the first radiating portion, the substrate, and the second radiating portion, the first radiating portion and the second radiating portion. The radiating portions are connected through a metal piece provided in the first through hole;

   It also includes a second through hole penetrating through the first antenna ground portion, the substrate, and the second antenna ground portion. The first antenna ground portion and the second antenna ground portion are disposed in the second The metal parts in the through hole are connected.
3. The antenna according to claim 1, wherein the coaxial line is located on one side of the first surface, the first radiating portion and the first antenna ground portion are spaced apart, and the coaxial line An outer conductor of the coaxial antenna is located at one side of the ground portion of the first antenna and is electrically connected to the ground portion of the first antenna, and an inner conductor of the coaxial line extends to the first radiation portion and is radiated to the first radiation portion Department of electrical connections.
4. The antenna according to claim 3, wherein there is a gap between the coaxial line and the first surface of the substrate.
5. The antenna according to claim 4, wherein the gap is greater than zero and less than one tenth of a wavelength, and the wavelength is a wavelength of an electromagnetic wave emitted by the antenna.
6. The antenna according to claim 4, wherein the gap is filled with a non-conductive medium.
7. The antenna according to claim 4, wherein the first antenna ground portion is provided with a through slot at a position corresponding to the coaxial line.
8. The antenna according to claim 7, wherein a projection of a central axis of the coaxial line in the through slot coincides with a central axis of the through slot.
9. The antenna according to any one of claims 1 to 8, wherein the antenna further comprises a second radiating unit and a second antenna ground unit provided on the substrate;

   The second radiation unit includes a third radiation portion provided on the first surface and electrically connected to the first radiation portion, and a third radiation portion provided on the second surface and electrically connected to the second radiation portion. A fourth radiating portion, and the third radiating portion and the fourth radiating portion are electrically connected, and the current path lengths of the third radiating portion and the fourth radiating portion are equal;

   The second antenna ground unit includes a third antenna ground portion provided on the first surface and electrically connected to the first antenna ground portion, and a second antenna ground portion provided on the second surface. The fourth antenna ground portion is electrically connected to the third antenna ground portion, and the third antenna ground portion and the fourth antenna ground portion are electrically connected, and the current path lengths of the third antenna ground portion and the fourth antenna ground portion are equal.
10. The antenna according to claim 9, wherein the third radiating portion is provided at an end of the first radiating portion near the first antenna ground portion, and the third antenna ground portion is provided on the first antenna portion An end of the first antenna ground portion near the first radiating portion;

    The fourth radiating portion is disposed at an end of the second radiating portion near the second antenna ground portion, and the fourth antenna radiating portion is provided at the second antenna ground portion near the second radiating portion. The end.
11. The antenna according to claim 9, wherein the first radiating portion and the third radiating portion are integrally formed;

    The first antenna ground portion and the third antenna ground portion are integrally formed;

    The second radiation part and the fourth radiation part are integrally formed;

    The second antenna ground portion and the fourth antenna ground portion are integrally formed.
12. The antenna according to claim 9, wherein outer contours of the first radiating portion and the second radiating portion are the same, and outer contours of the first antenna ground portion and the second antenna ground portion are the same ;

    An outer contour of the third radiating portion and the fourth radiating portion are the same, and an outer contour of the third antenna ground portion and the fourth antenna ground portion are the same.
13. The antenna according to any one of claims 1 to 8, wherein the antenna further comprises a hollow housing, the substrate, the first radiating unit, the first antenna ground unit, and the coaxial The wires are all located in the inner cavity of the shell, and the shell has a channel through which the coaxial wire can pass.
14. A remote control for an unmanned aerial vehicle, comprising a housing and the antenna according to any one of claims 1 to 13 mounted on the housing.
15. An unmanned aerial vehicle, comprising a fuselage and a remote controller of the unmanned aerial vehicle according to claim 14 used in conjunction with the fuselage.

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